nobu	2018-12-03 12:15:42 +0900 (Mon, 03 Dec 2018)

  New Revision: 66147

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=66147

  Log:
    Cherry-picked spec/mspec/lib/mspec/helpers/fs.rb
    
    From https://github.com/MSP-Greg/ruby/commit/316f60e3befa312320b2cc600d7b59ba64f12329

  Modified files:
    trunk/spec/mspec/lib/mspec/helpers/fs.rb
Index: spec/mspec/lib/mspec/helpers/fs.rb
===================================================================
--- spec/mspec/lib/mspec/helpers/fs.rb	(revision 66146)
+++ spec/mspec/lib/mspec/helpers/fs.rb	(revision 66147)
@@ -1,12 +1,6 @@ https://github.com/ruby/ruby/blob/trunk/spec/mspec/lib/mspec/helpers/fs.rb#L1
 # Copies a file
 def cp(source, dest)
-  File.open(dest, "wb") do |d|
-    File.open(source, "rb") do |s|
-      while data = s.read(1024)
-        d.write data
-      end
-    end
-  end
+  IO.copy_stream source, dest
 end
 
 # Creates each directory in path that does not exist.

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